Spring-wheel



W. LEVISTON AND J. PERRY.

SPRING WHEEL.

APPLICATION FILED NOV. 7. 1918.

if g 33 5%; FT? Patented Aug. 24; "1920.

BY Fe ,ry.

Application filed November 191 8. Srial1 K025261580.

' I 'WALLA' LEvrs'roN Am) .iormrnnnY; or mas acres; urssounr.

TozaZZ whomit may'don'cern:

Be it known that we,

' 31st St. and 2830 Tracy avenue, respectively,

ings, and to the letters. and figures of'refhave invented certain new and useful Im'- provements in Spring-Wheels; and we do T declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, ref-f erencebeing had to the accompanying draw this specification. f

This invention relates tospringwheels and particularly to wheels capable of support-.

ing heavy loads.

One of the objects thereofis to provide a wheel which will have the advantages of a pneumatic tired wheel without its disad-. vantages. Another object is to provide -a spring or set of springs'around the periphv cry of the felly which, in service, will have a rolling action so that there will'be. no; local bending strains tending to cause cry'stalli zation of the material of which thespring ismade.

Other objects and advantageswlll be apparent hereinafter as the nature. of the in.-

vention is better understood,f'it being apparent the changes in form. t)roport1on and minor details of construction-maybe resorted to withoutdeparting from the spirit of the invention or sacrificing any of its ad- I vantages. V

In the drawings.

'Figure I- is a transverse sectional iew. through a wheel constructed n accordance with our invention. I I i Fig. II is a fragmentary perspect ve. view of a completed wheel and I Fig. III is a detail perspective view ofonej of the springs.

Referring now to the drawings by numer felly 4: as shown'in Figs. IandI'I. i'6' designates the rim' which maybe providedwith S pecifieatien of Letters i e WALLA Lnvis'rori and JOHN PER Y, citizens of the United States,

ar oulld 'the periphery of the felly Thes enu igaaiezo;

lent tread I 9. The the felly are con- :nected together by springs arranged pairs .iJIiOl fiXlZeIlCllIlg 1n circular; ser-lesi-entirely By so constructing the loop the leaves 10 and 11 are connected by a loop consisting of a double compound parabolic curved portion so that when the springis put under tension, thatis, when one leaf is movedin the directionof the other, there will be a rolling motion impartedto-the body portion of the v a loop so that there will be no local bending thereo fpto cause crystallization of, the ;ma-

terial. This is an important advantage inasmuch as. springs heretofore used for similar purposes have had a tendency to quickly become: weakened; or break on account of ,the crystallization due to the vibration of the wheel passing over an uneven surface. By referrmg to Fig. I, 1t will served th'at the leaffll is slightly off-set rwith respect to theleaf 10 due to the fact, i that the felly is-of slightly less width "than the rimi' By-referring to Fig.1 it will also 18 and 19 reinforcing the sides of the rim 6.

on the rim by the clamping rings 23 and these in place,

Inasmuch as the springs are arranged. in. 'pairswith-their loops inwardly disposed, a. tendency of the rim to become displaced due; to side thrusts, will be strongly opposedbe' cause thetension on the sides of thewheel is cient manner,

be observed that the. sides" of the fellyfar'e, reinforced byrings 16 and 17; similar rings,

0 Between these reinforcing rings and the" clamping rings 20and 21 are secured the ofl- I. i set .ends 11 of the springsyth'ese being se* I cured by the: through bolts 22. The leaves 10 are fastenedagainst the rings 18 and 19 9 5 1 .equal and opposite. "Attention is alsjo di rected ,tojthe" fact that inasmuch as the: "springs are arranged 'incircular series'be- Y tween the felly and therim, there will be. ignates a peripheral band embra'cing thefjtension? applied to each spring whenever a;

loadis placed onthe wheel, thus equalizing;

the-load throughout the. springs .inan effi-* 110 The top springs will have a tendency to A spring Wheel and the rim and having intermediateloops Vprojectinglaterallybetween the telly and therim,f1sai'clsprings being arranged in; pairs 7 in transverse relation, the V loops ineach i comprising hub and? spokes, a rim spaceclfromthe felly,springs n10 .iarranged in circular series about the telly being in the form of a double com- 15 pound curve providing. a, contracted loop having alining outwardly and inwardly progject-ing ends lying against the outer edges 'of-therim and fellyyand circular clamp; ing plates extendingaround the fiellynand 20 'rim' on opposite sides, between which" and the rim and jelly the respective ends of the springs are secured.

times I JOHNgPER-RY; 1

I In testimony whereof-We. afiixaour 'signag WALLA LEVISTON; r 

